clark



(No Model.)

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FLOUR BOLT.

No. 492,914. Patented Mar, 7, 1893.

N w. CLARK 7 E (1371155865: MYR

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No. 492,914; Patented Mar. 7, 1893.

H g n m MWN MYRO W. CLARK,

No. 492,914. Patented Mar. 7, 1 93.

My o/v W. CLARK,

@l'bllowew (No Model.) 5 SheetsSheet' 5. M. W. CLARK. FLOUR BOLT.

No. 492,914. Patented Mar. 7, 1893.

MYRON w. CLARK,

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ATENT MYRON W. CLARK, OF PARMA, MICHIGAN, ASSIGNOR, BY MESNEASSIGNMENTS, OF ON E-HALF TO THE EDWARD P. ALLIS COMPANY, OF MILWAUKEE,

WISCONSIN.

FLOUR-BOLT.-

SPEGIFICATION forming part of Letters Patent No. 492,914, dated March 7,1893.

Original application filed November 18, 1886, Serial No. 219,319.Divided and this application filed January 24, 1893. Serial No.

' 459,550. (No model.)

To to whom it may concern:

Be it known that I, MYRON W. CLARK, a citizen of the United States,residing at Parma, in the county of Jackson and State of Michigan, haveinvented certain new and useful Improvements in Flour-Bolts, of whichthe following is a specification.

My invention relates to flour bolts, and consists in certainimprovements hereinafter set forth, the present application being adivision of one filed by me on the 18th day of November, 1886,designated by Serial No. 219,319.

Figure 1 is a side elevation of a flour bolt embodying my invention,parts of the casing being broken away to show the structure, part of thebolting cloth of the reel being omitted. Fig. 2 is a longitudinalsection taken on the dotted line 00-00, of Fig. 4. Fig. 3 is a verticaltransverse section. Fig. 4. is a rear elevation, parts of the casingbeing broken away. Figs. 5, 5 6, 6, 7 and 7 are detached views of thebearers which support the cloth hoops or rings. Fig. 8 is a transversevertical section of a modified embodiment of the invention. Fig. 9 is avertical section on line y-y of Fig. 8.

The object of this invention is to utilize a much greater portion of thebolting cloth than is customary with slowly moving reels of the ordinaryconstruction; and it consists in certain new constructions andcombinations of parts, as will be hereinafter set forth.

Like letters of reference indicatelike parts in all the figures.

A, A, represents generally the frame-work and casing, within which theoperative parts of the bolt are located.

B is the central driving shaft, mounted in suitable bearings and havinga belt pulley fastened upon it.

Within the bolting cloth there is a closed drum or hollow cylinder whichI will describe. Of this drum, 0 is the head nearest the tail end, thatis the discharging end of the bolt. The drum head has a central sleeve,with a set screw, 0, for securing it to the central shaft B. D is asimilar head at the receiving end of the bolt, and which may be securedto the shaft B, when desired, by a key or set screw.

E is a shell mounted upon the drum-heads which it fits closely at eitherend. This shell may be of sheet metal, wood, or other suitablematerial,-and its surface may be circular in cross section, or ribbed orcorrugated as shall be desired or found advantageous according to thecircumstances of the case.

I will describe the structure of the reel which surrounds the drum.

F is a short cylinder section or tube, supported at the head end of thebolt, into which opens a hopper or feed spout, a.

f, is a worm mounted on shaft B to feed the material from the hopper, a,through the tube section F, and thence into the reel.

G, g, is the reel head at the receiving end of the bolt; g, g, beingarms which connect the centrally open flange portion with a hubsurrounding the shaft B, and secured thereto by a set screw b or otherequivalent device.

At the tail end of the reel there is a ring, flange, or centrally opendisk, I, with a rearwardly projecting flange i; the outside diameter ofthe part I being the same as the outside diameter of the reel head G, g.Thus the part I is adapted to serve as a separate ring for one end ofthe bolting cloth.

J is a hub, mounted on shaft B, to which it is secured and preferablymade adjustable thereon by a set-screw,j, for a purpose which will behereinafter explained. Of course the hub and flange are connected bymeans of spokes.

it, It, are inclined arms projecting forward and inward from the flangeI, to the drum head 0, which arms may be made to partially support thesaid flange. It is not indispensable that these arms be integral withboth the ring and the drum head. In fact, some of the adjustments can befacilitated by making these parts in two pieces, so that one can 0 berotated about the central shaft independently of the other.

K, K, are stay rods, screw-threaded at their outer ends and passingthrough the reel head G, g, and the flange I, to which partsthey arefirmly secured by means of nuts; there being by preference two nuts ateither end of each of the stay rods, as indicated in Fig. 2.

L, L, are elevators mounted on the stay rods by means of centrally opencarriers sur- I00 rounding the stay rods, part or all the carrierssurrounding the stay rods being provided with laterally projecting lugs,Z, fora purpose which will be explained.

The bolting cloth is indicated at M, and is supported intermediate ofits ends upon a series of cloth hoops or rings N, N, when ever thelength of the bolt is such as to make one or more supports of thischaracter desirable. In Figs. 1 to 7, each cloth ring is mounted uponthe stay rods by means of interposed bearers, each bearer consisting, inthis instance, of a stirrup ring, n, the circular part of which has aninside diameter a little greater than the outside diameter of the stayrod, and has a screw-threaded hole in the outer angular portion. Thesaddle part N, has the ends of its legs concaved to fit the stay rods.The hole in the upper flat part of the saddle registers with thescrew-threaded hole in the angular part of the stirrup and receives abelt or screw which passes through a countersunk hole in the cloth ringor hoop, whereby these parts are firmly held together in proper workingrelation to each other and to the stay rods.

The bolting cloth at the tail end of the reel is turned down over theouter edge of the flange I, toward the rearward projecting flange z,against which it is clamped by a strap or band 0, or a cord or othersuitable device. At the forward or head end of the bolt and between thereel head G, g, and the casing, there is a cloth tightener, consistingessentially of a metal ring P,having a wooden ring 1), attached to itsfront face to receive the front end of the bolting cloth, which istacked thereto.

Although I propose to make the parts P, p, of diiferent materials, yetthey constitute essentially a single movable and adjustable ring, ofwhich the wooden part is specially adapted to have one end of thebolting cloth attached to it.

Q, Q, are bolts, screw-threaded at their inner ends where they areseated in the reel head G, g. Each bolt is provided with a flange orshoulder, q, engaging with the inner face of the ring I, through whichthe outer end of the bolt projects; so that by turning these bolts inthe proper direction, the ring P, can be moved forward or outward fromthe reel head and the bolt cloth thereby properly stretched, thisclotlrtightener ring and the adjacent reel head being of substantiallythe same diameter,as will be readily un derstood without furtherexplanation.

R is a partition, a short distance inside the tail end of the casing.This partition has a central opening to receive the rearwardlyprojecting partt' of the flange, and the space between the flange andthe partition may be packed with wool or its equivalent, to preventleakage at this point.

The space between the partition R and the tail end of the casing,constitutes a tailing chamber, which is hopper-bottomed, as indicated inFig. 4:,-and. opens into a trap, consisting essentially of revolvingwings, S, S, which run in close proximity to the surrounding walls 5, s,in such manner that the tailings are discharged downward through thespout r, while the wings eifectually intercept air currents whichotherwise might pass through the spout.

In setting up and operating this bolt, I propose to fasten the drumsecurely to the central shaft, then place the reel head G, g, and theflange I, loosely on the shaft; the elevators are then placed on thestay rods and the ends of the rod inserted in the reel heads and theflange, after which thereel heads and flange are firmly fastened to theshaft, B. Preferably, I locate the head G, g, with its flange part aboutfive inches from the front end of the drum; and to prevent leakage Iattach a ring 11, 7L, to the reel head. The ring is provided at itsinner edge with a vertical flange 71. for this purpose, and the spacebetween the ring and the shell F of the feeder is packed, as shown at V,preferably with sheep skin with the wool attached, which fills theannular space between the ring and the shell. When it is desired, theelevators maybe arranged somewhat spirally relative to the bolting clothand the drum before the reel head and the ring are permanently attachedto the central shaft. In case the ring or flange I, and the inclinedarms 7c, 76, are made integral with the drum head G, the spiraldirection of the elevators may be regulated by turning the reel head G,g, upon the shaft B; but when these parts are not madeintegral it may befound more convenient to regulate this spiral arrangement by turning theflange I and its hub upon the shaft after the reel head G, g, has beensecured to the shaft. hen preferred, however, the arms lc, 7;, may beomitted. By preference, the bearers which are interposed be tween thecloth rings and the stay rods are so located relatively to the swingingcarriers to which the elevators are attached, that the projecting lugs Zof the carriers shall engage with the bearers and limit the oscillationor swing of the elevators about the stay rods. The conveyors are drivenfrom the shaft B by means of chains or belts traversing sprocket wheelsor pulleys, as indicated in Fig. 1.

hen the bolt is in operation material is fed in through the hopper a,and thence through the shell, the worm, and the openings between thearms g, g, of the reel head, to the bolt cloth.

As the cloth, the elevators, and the drum revolve in the directionindicated by the arrow in Fig. 3, part of the material is caught by theelevators on the upward moving side of the bolt and discharged therefromon the outer surface of the drum, whence it is returned to the boltingcloth,-some of it going over the drum and being delivered to the boltingcloth 011 the downward moving side of the bolt. Part of the materialwhich is carried over the top of the drum is delivered to the boltingcloth at a comparatively short distance below the highest point of thedrum; owing in part to the centrifugal action upon the material, whichis produced by the action of the drum.

It will be readily understood from an examination of Fig. 3 that therelative positions of the elevators and of the downwardly inclinedsurface of the drum, as also the relative positions of the elevators andthe bolting cloth, are such as greatly to facilitate the bolting orsitting action, because they assist in properly directing the materialaround the inner surface of the bolting cloth and in contact therewithnot only upon the upward moving side of the reel, but also upon itsdownward moving side. That is to say, as shown in Fig. 3, the elevatorshave their outer or free edges set away from'the bolting clothsufficiently to afford a space between the cloth and the elevators wideenough to permit a part of the chop, meal, or flour to fall back fromthe elevators to the cloth and to descend over the ascending side of thereel. So too, a quite Wide space is left between the elevators and thedrum, so that the elevators may not interfere with the movement of material over the surface of the drum.

The thickness of the cloth hoops and the covering applied thereto, asplainly shown in Figs. 2, 3, and 8 would of themselves give sufficientspace for a considerable back-flow of material; but the proper workingof the reel is best assured by keeping the elevators out of contact withthe hoops, which may be done by proper arrangement of the stops on theelevator clips or carriers.

In operating this bolt, it will be found that with a proper speed ofrotation, say about thirty revolutions per minute for a reel ofthirty-six inches in diameter, the material will be sifted through thecloth on both the upward moving side and the downward moving side up toa line drawn horizontally through the reel about half way between itsaxis and its highest point. Thus nearly the whole area of the boltingcloth will be made available for bolting purposes.

While 011 some accounts I prefer to use a cylinder shaped drum, yet I donot wish to be limited thereto; because its surface might be corrugated,ribbed, or troughed, as is sometimes done in this class of bolts. Nor doI wish to be limited to the use of a drum which rotates in the samedirection with the reel,- nor to one having the same speed as the reel.

In Figs. 8 and 9 I dispense with the stay rods K, K, and bearers N, n,for connecting the reel heads and supporting the cloth, and use insteadthereof spiders T, T, firmly secured to the shaft B,with bars U, uattached at their ends to the spiders by means of bolts t, t, or theirequivalents. These bolts may pass radially through the ends of the barsinto the peripheral flanges of the spiders; or arms to the outer ends ofwhich the bars may be attached by means of bolts passing through. thebarsand the lugs on lines which are substantially at right angles to theradial lines on which the lugs are formed. In either event the barsshould have outward projections or lugs, to which the cloth rings arebolted or otherwise secured; and by preference, the outer faces of thelugs are grooved to receive the cloth rings and thus assist insupporting them against displacement. In these figures, there is also asimilar cloth-tightening ring P, p, and adjusting bolts Q, Q, which havetheir inner ends seated in either the arms or the flange of the spiderat the head end of the bolt. In this modification, the packing ring H,is attached to and carried by the clothtightening ring P, 1), therebeing of course a suitable packing material in the annular space betweenthe ring and the shell of the feeder.

With the construction shown in Figs. 1 to 4:, there is liability, insome cases, if the cloth does not fit tightly to the flange G of thereel head, of material passing between this flange and the bolt cloth,and then through the ring into the conveyor, and being mixed withmaterial which has been bolted. To guard against such occurrence Ipropose to use a similar packing ring in connection with and attached tothe tightening ring as is indicated in the drawings at H; and where thislast referred-to packing ring is used it may be found advantageous toomit the packing ring H, h, from the construction shown in Figs. 1 to 4.In other words, the packing ring H, h, may be made fast either to thereel head or to the tightening ring as preferred, but there is obviouslyno need of using two such rings.

In the modified form shown in Figs. 8 and 9, the elevators L L areprovided with pivots w, to, at their ends, these pivots being seated andturning in the flanges of the spiders, the

arrangement of parts being such that the swinging edges of the elevatorsengage with the cloth hoops or other stops during part of eachrevolution of the bolt to pick up material, and as they move upward theyautomatically tilt inward and discharge the material upon the drum.While I have indicated a relative arrangement of these parts in Fig. 8which will operate satisfactorily under ordinary circumstances, yet I donot wish to be limited thereto,it being apparent that the point in therotation of the bolt at which the elevators shall tilt inward anddischarge their load may be varied by changing the position of thepivots toward or from the center of the reel, as may be found mostadvantageous under any particular circumstances or conditions.

Having thus described my invention, what I claim is 1. In a flour bolt,the combination of a rotatable bolting reel, an imperforate drum withinthe reel, and a series of intermediate elevators carried by the reel forthe purpose of discharging material upon the drum,the

IIO

edges of the elevators being separated from the cloth of the reel.

2. In a flour bolt, the combination of a retatable bolting reel, animperforate drum within the reel, and a series of elevators between thereel and drum, the edges of the elevators being set away from the clothof the reel and also from the surface of the drum.

3. In a flour bolt, the combination of a rotatable bolting reel, animperlorate tlrn 11 within the reel, and a series of elevators carriedby the reel, between the reel and the drn m, the edges of the elevatorsbeing set away from the cloth of the reel and also from the surface ofthe drum.

4. In a flour bolt, the combination of a rotatable bolting reel, asmooth drum within the reel, and a series of elevators between the reeland drum, the edges of the elevators be ing set away from the boltingcloth and from the drum.

5. In a flour bolt, the combination of an external bolting reel, aninternal drn m, and tipping elevators between the bolting reel and thedrum, and separated at their eilges from both.

6. In a flour bolt, the combination of an external bolting reel, asmooth internal drum, and a series of tipping elevators between thereeland the drum, the edges of the elevators being set away both fromthe reel and from the drum.

7. In a flour bolt, the combination of an external bolting reel, aninternal drum, and a series of tipping elevators between the reel andthe drum, the edges of the elevators being set away from the reel.

8. In a flour bolt, the combination of an external bolting reel, asmooth internal drum, and a series of tipping elevators between the reeland the drum, the elevators being set away from the reel.

9. In a flour bolt, the combination of a rotatable bolting reel, animperforate drum within the reel, and a series of elevators carried bythe reel, between the reel and the drum, the edges of the elevatorsbeing set away from the cloth of the reel.

In witness whereof I hereunto set my hand in the presence of twowitnesses.

MYRON IV. CLARK.

Witnesses:

PETER GILBERT, Roe'r. G. EDMONDS.

